Arithmetic and control unit



FIG. 1 is a front right top perspective view of an arithmetic and control unit showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front right bottom perspective view thereof.

Portions of FIGS. 1-8 that are shown as broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an arithmetic and control unit, as shown and described. 